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http://dx.doi.org/10.17664/ksgee.2020.16.2.001

A Study on the Relationship between Surface Condition and Critical Heat Flux in Heat Exchanger  

Kim, Woo-Joong (Department of Nuclear & Energy Engineering, Jeju National University)
Kim, Nam-Jin (Department of Nuclear & Energy Engineering, Jeju National University)
Publication Information
Journal of the Korean Society for Geothermal and Hydrothermal Energy / v.16, no.2, 2020 , pp. 1-6 More about this Journal
Abstract
This work experimentally explored the influence of nano-fouling on CHF, flow boiling heat transfer coefficient, contact angle, and surface roughness. In this study, the flow velocity conditions are established at 0.5, 1.0, and 1.5 m/s. Also, the nanoparticles of oxidized MWCNT were deposited on a heat transfer surface for 0, 120, 180, and 240 sec. As the results, it was found that CHF and superheated temperature were increased in case of nano fouling on the heat transfer surface in oxidized MWCNT fluid. Also, the contact angle and surface roughness decreased when flow velocity and nano coating increased.
Keywords
CNT; OMWCNT; Nanofluid; CHF; Heat transfer; Heat Exchanger;
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Times Cited By KSCI : 2  (Citation Analysis)
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